Library of Heaven's Path

Zhang Xuan crossed into another universe and became a glorious teacher, with a mysterious library in his mind. All he has seen, whether people or things, can automatically form a book and record the various shortcomings of the other party, so he is hugely awesome! "Emperor Haotian, why don't you like to wear underwear? A majestic Emperor can pay a bit more attention to the appearance?", "Fairy Exquisite, if you can't sleep at night, you can call me. I sing lullabies very well!", "And you, Qiankun Demon King, can you eat less onions otherwise you smoke me to death?"...This is a story of a flashy and f#@$ing awesome man who cultivated and directed the most powerful in the world, for the sake of succession of teachings.